I hit the 'Enter' button too quickly, DL corrected me with un cinto -I thought that I remembered an easier way to translate 'belt'; I am not sure of the difference, however. Are there any knowledge holders here on the subject?

It depends on if it's describing nouns that end "feminine" or "masculine." So, nouns that end in "a" get una (una falda, una camiseta, una naranja, una casa). And nouns that end "o" and most "e" get un (un sombrero, un regalo, un reloj, un pasaporte)...